Nexon

If you haven't recieved your email yet

Go into account info, and make sure that you checked the little box that says you can recieve emails from Nexon.
If your email is no longer existing, make the email again, and it should show up
If you wish to change your email, as you no longer have access to it, use this website:
http://www.nexon.net/support/supportform.aspx?view=email